CAR WILL NOT SHIFT AFTER 45MPH.....

Asked by Jul 09, 2012 at 09:28 AM about the 1995 Pontiac Grand Prix

Question type: Maintenance & Repair

TO EXPLAIN BRIEFLY, MY 1995 PONTIAC GRAND PRIX GTP WILL NOT SHIFT AFTER 45-50MPH IT WILL DROP IN RPMS TO 1500 AND STAY THERE NO MATTER HOW FAR I PUSH THE GAS PETAL.. SOMEONE PLEASE HELP ME HERE IVE HAD SO MANY DIFF ANSWERS FROM ITS MY TRANNY, THEN I WAS TOLD ITS A CLOGGED CATALYTIC CONVERTER.. IVE HAD THIS CHECKED AND THEY SAY NOTHING IS WRONG..

5 Answers

13,625

Check all the connectors on your PCM located blow the air filter. The PCM is what determines shift points based on inputs from engine sensors. When working with these connectors have battery disconnected.

515

PCM is an acronym that stands for Powertrain Control Module. PCM is the onboard computer which is the brain of the engine control system. So basically just disconnect the battery for at least 5 minutes or so..it should reset the computer in your car. Hope that helps :)

655

It is also possible is is a smililar problem to what the Monte Carlo (same trans in most models) has where the board in the trans fails. If the PCM reset as described above by Aztec and Rachel it is likely to be that board.

1 of 1 people found this helpful.
145

its the pcm maybe something unpluged to the tranny but its most likely the problem is the pcm unhook it for 5 to 10 min and you should be good :) good luck

1 of 1 people found this helpful.

buy a trans am

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,470 nationwide Grand Prix listings starting at $1,900.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,580
  • #2
    Tom Demyan
    Reputation
    3,170
  • #3
    munron
    Reputation
    2,590
View All

Related Models For Sale

Used Chevrolet Impala
506 Great Deals out of 32,380 listings starting at $1,000
Used Pontiac Bonneville
3 Great Deals out of 411 listings starting at $1,995
Used Chevrolet Monte Carlo
7 Great Deals out of 1,174 listings starting at $1,125
Used Pontiac Grand Am
964 listings
Used Chevrolet Camaro
398 Great Deals out of 31,484 listings starting at $3,495
Used Ford Mustang
341 Great Deals out of 42,379 listings starting at $1,488
Used Pontiac Firebird
10 Great Deals out of 690 listings starting at $2,850
Used Jeep Grand Cherokee
901 Great Deals out of 71,278 listings starting at $900
Used Nissan Maxima
333 Great Deals out of 20,670 listings starting at $1,175

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 383 listings starting at $1,900
2007 Pontiac Grand Prix For Sale
332 listings starting at $4,499
2006 Pontiac Grand Prix For Sale
3 Great Deals out of 440 listings starting at $4,000
2005 Pontiac Grand Prix For Sale
326 listings starting at $3,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.